The fleet should be about
half-done then. IMO you might as well be asking about winning lottery ticket numbers for June 2011- I doubt even UA's route planners know exactly which routes will have which planes 8 months from now, outside of a few guesses/general rules (LHR is a priority, long routes like IAD-DXB are likely to see them first, and so on).
If you want to maximize your chances at the new config, fly to Europe through LHR.